Lasting machine



m m, 1923; am-am A. BATES LASTING MACHINE Fild May 16.1921- Wag Patented Jet. 30, 1923.

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ARTHUR BATES, OF LEICESTER, ENGLAND, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATTERSON, NEW JERSEY, A CORPORATION OF NET/V JERSEY.

,LASTING MACHINE.

Application filed May 16,

To all whom it may concern Be it known that T, ARTHUR BATES, a subject of the King of England, residing at Leicester, Leicestershire, England, have in vented certain Improvements in Lasting Machines, of which the following description in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to mechanism applicable to machines, in which a number of steps or operations are performed in each cycle, for varying the portion of time devoted to one step or operation or to certain operations while maintaining the entire time consumed by the cycle constant. The invention is herein shown, by way of example, as applied to a machine of the type disclosed in United States Letters Patent No. 58%,74t t, granted June 15, 1877, on application of Ladd & McFeely. Tn machines of this type a gripper operates upon successive portions of the upper step by step about the periphery of the shoe to updraw and overlay the upper upon the shoe bottom.

The problem of the designers and users ofsuch machines has been to secure from them thorough stretching of the upper and the conforming of it to the last while deal ing adequately with the various working conditions occasioned by various kinds and conditions of upper stock from which the stretch is to be removed in lasting and also to obtain from the machines large or increased capacity of production. The working out of a satisfactory solution of this problem has engaged the attention of many skilled in theart; one advance toward this end, which has achieved commercial success, being disclosed in United States Letters Patent No. 1,060,967, granted May 6, 1913. on my application, wherein by overlapping of the operations more time for the thorough performance thereof was secured without loss of output. The present invention is illustrated herein in its application to the machine disclosedin my said prior patent.

It is an object of the present invention to meet this problem of thoroughly stretching the upper by securing more time in the cycle for the upper stretching operation without substantially, if at all, increasing the total time taken for the cycle of operations. It

1921. Serial No. 470,161.

is to be understood, however, that the invention in its broader aspects is not limited in its application to this particular type of machine or to dealing with an upper stretching operation.

A feature of the invention consists in an organization including a plurality of means or instrumentalities for performing a succession of operations upon the work in each cycle, common operating means for operating the instrumentalities in timed relation, a driving member arranged for rotation at uniform angular velocity and means between the driving member and the common operating means acting to retard movement of said operating means relatively to the driving member while one of said instrumentalities is operating, and for accelerating movement of said operating means above that of the driving member at another time in the cycle of the machine. As herein shown, the invention is utilized to increase the time devoted to the updrawiug of the upper in a hand method machine relatively to the time consumed by the machine in completing the cycle and without increasing the time occupied by the whole cycle. The particular time interval best suited for the particular operation in question can be obtained without the necessity of correspondingly varying the time con-- sumed in other operations of the machine such as would be brought about if the nor mal speed of the cam shaft of the machine was merely altered to another uniform speed. Moreover, the desired result can thus be obtained without the need of redesigning the existing cams or other timing mechanism of the machine to do which, of course, would involve great inconvenience and expense in view of the machines already in use, and would necessitate the redesigning of machines of this type.

Another feature of the invention consists in the combination with a driving member, a shaft and operating instrumentalities actuated in common by the shaft to pew.- form a succession of operations, of means between the driving member and the shaft operating in each cycle to diminish the movement of the shaft relatively to that of the driving member for a part of its cycle, to increase the angular movement of the shaft relatively to that of the driving member in another part of the cycle,

and to maintain for a portion of the cycle the speed of the driving member and the shaft the same. As herein shown a master cam is provided which is stationary, and connections between the driving member or pulley and the shaft are controlled by the master cam to cause the shaft in one portion of the cycle to move slower than the driving pulley and in another portion faster. Preferably and as shown, during certain portions of the cycle the master cam maintains the movement of the shaft the same as that of the driving pulley, that is, there is no relative movement between the driving member and the driven member or shaft.

By this construction the time lost in one portion of the cycle by reducing the angular velocity of the shaft, for instance, the cam shaft of a hand method machine, to secure more time for the upper stretching operation, may be made up during each revolution of the cam shaftso that the total time for thecomipletion of the machine cycle is unaffected. Moreover, the speeding up of the cam shaft beyond the hitherto normal speed to recover the lost time may benonuniformly distributed, over the remainder of the cycle and, as shown, it is localized to occur in the concluding portion of the cycle,

and, in fact, as applied to the hand method machine, may occur in two separate stages respectively between the completion of the updraw and the commencement of the wiping operation andbetween the conclusion of the tack driving and the end of the cycle.

These and other features of the invention will appear more fully from the following description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a perspective view of the operating means and instrumentalities of a hand method lasting machine equipped with the present invention, 7 I

Fig. 2 is a rear view of mechanism embodying this invention, and

Fig. 3 is a side view of the parts shown in Fig.2.

Since the construction and operation of the hand method machine in which the present invention is herein shown as embodied by way of illustration is fully described in the above-mentioned patents, a brief description only of the machine will now be given.

In Fig. 1 of the drawing a construction embodying the present invention, together with the operating instrumentalities of the hand method machine and the mechanism for operating them, is shown, the frame.

4 carries a series of cams by which all of the operating instrumentalities "are actuated, the gripper 6 being closed upon the work by the action of the edge face of a cam block 8 acting through an arm 10 on a rockshaft 12 which carries an arm 14 arranged to move downwardly the upper or movable jaw 15 of the gripper. The gripper 6 is moved vertically to effect updrawing or stretching action on 'the upper by an updraw lever 16 pivotedat 18 and operated by a cam 20 on the cam shaft 4. The overdraw movement of the gripper to lay the upper over the shoe bottom is derived from a cam on the rear face of the cam block 8 through a push rod 22 and spring arm 24. The

lateral and plaiting movements of the grip per are effected by the movement of an oscillating driver 26 operated through a lever 28 by a cam path 30 in the front face of the block 8, these movements being controlled at the will of the operator by a rod 32 connected to a knee lever (not shown). The combined tack block and wiper 34 is attached to a slide 36 operated by acam 38 through a lever 40. The driver 42 is operated to drive the tack, delivered to the tack block 34 in any known manner, after the lower face of the tack block has acted to wipe the upper over the shoe bottom and near the comp etion of the cycle of the machine. 7

In the operation of the mechanism above described the first 100 degrees or thereabouts of angular movement of the cam shaft 4 from what may be considered as the starting point, for instance when the grippers are opened, is devoted to the seizing of the upper by the gripper which, during this movement of the cam shaft, is moved toward the upper by the cam 20 andclosed upon the upstanding margin of the upper by the cam 8. In the next degrees or thereabouts of the movement of the cam shaft the major portion, if not all. of the straining of the upper and the pulling of it inwardly over the edge of the last are performed, the updrawing contirming through the whole of the 40 degrees of said movement, the overdraw being in action for say the last 10 degrees of this 40-degree portion, and the plaiting action of the gripper, if employed, starting at the same point in the angular movement of the camshaft as the updraw but continuing to say 200 degrees from the starting point of the cycle. During the remainder of the cycle there are two portions or stages of the rotation of the cam shaft in which none of the. operating instrumentalities described has any substantial operative movement. One of these stages (a) occurs between the conclusion of the 40-d'egree movement mentioned and the commencement of the overwiping on the shoe bottom by the wiper 34 and amounts to about 70 degrees. The other stage (6) occurs between the conclusion of the tack driving operation and the end of the cycle and amounts to about 100 degrees.

The purpose of the present invention as embodied in a machine of the kind de scribed is to prolong the time during which the cam shaft is given the -degree movement above mentioned for updrawing the upper so that this operation will be more slowly and effectively performed, and to make up the time lost in this operation during the stages (a) and (b) above explained during which no effective work is being done by the machine'which would be disturbed by the necessary acceleration of the cam shaft to make up the lost time.

As shown herein the mechanism for this purpose comprises a driving member or pulley 44 which may be loosely mounted on the end portion of the cam shaft 4 or may be on separate shaft coaxial with the shaft 4 and supported "for rotation in any suitable manner, the only essential being that the driving pulley 44 be arranged for rotation at uniform angular velocity when the machine is in normal operation and have positive driving connection with a inei'nber or arm 46 which, therefore, is uriven at constant angular velocity. On the outer end of the arm 46 is fixed a pin 48 on which is rotatably mounted a block 50. The block 50 slides in a slot 52 formed in one corner oi a triangular lever 54 which, at another corner, is pivoted at 56 to an arm 58 fast on the cam shaft 4. The third corner of the lever 54 carries a cam roll 60 which is held by a spring 62 against the edge oi": a stationary cam 64 which is fixed at 61, 63 to a. suitable part of the machine frame, the spring being sulliciently strong; to u'iaintain the roll 60 at all times against the cam 64. It will be evident that it the member 46 is rotated at a uniform augula r velocity the cam. 64 will, at all parts concentric with the cam shaft, cause the .iuemher 58 to be rotated at the same angular velocity but that an inclined portion of the cam will cause a change of relative speeds oi the parts 46 and 58, an increasing radius of the cam causing a decrease in the speed of the arm 58 and. consequently of the cam shatt and vice versa.

The acting edge face of the cam 64 is ronccntric with the shaft for the first 100 degrees reckoned from the normal position o? the cam roll 60 when the machine is started. the grippers during this period l ning lowered and closed upon the upper. The cam is then shaped to move the cam roll 60 outwardly with respect to the shaft so that an, angular movement of 80 degrees at the driven member 46 is required to advance the cam shaft 4 through the next 40 degrees. This results in slowing down below the hitherto normal speed the speed of the cam opera-ted parts during this 40-degree portion. As stated the retardation is such as to give the 40-degree portion of the cycle about twice the normal time for its performance. Since this slowing down is effected by the shape of this portion of the cam it will be appreciated that the deceleration may be either uniformly distributed v ver the 40-degree portion or may be greater at one part of it than at another, as desired. For instance, it may be preferred to cause the whole of the slowing down or deceleration to occur in the early part of the 40-degree portion, that is, before the overdraw occurs.

During the next degrees of movement of the member 46 the cam is shaped to permit the roll 60 to approach the shaft with a consequent increase of the angular movement of the shaft 4 relatively to that of the member 46. As shown the angular move ment of the shaft will be, during this portron. about 50 degrees, this being the first stage (a), that is, the stage between the conclusion of the deceleration or the end oi the said 40-degree portion and the commencement of the overwiping on the shoe bottom by the wiper 84. From the point now reached the cam is concentric for about 50 degrees during which the overwiping and tacking operations are effected. These operations, therefore, are conducted under exactly the same speed conditions as in the past. From this point the cam 64 allows the roll 60 further to approach the shaft during the remainder of the rotation constituting 100 degrees of stage (6) above referred to. During this period the speed of the member 58 is accelerated so that the remainder of the lost time made up. Thus the making up of the time lost during the updraw is localized to occur during two separated portions of the remainder of the cycle. about one-halt being made up during 70 degrees of stage (a) and the remainder during the 100 degrees or thereahouts of stage (7)). The result of thus dividing and localizing the making up ot the time lost during the updra-w is that the cam shaft is accelerated duringthose portions of the cycle when the operating instrumcutalities are not actively engaged upon the work and hence have no e'h ort upon the operation oi" the machine.

In order that the cam shaft 4 of the machine may be run at uniform speed heretofore, it desired, it is only necessary to provide a hole 66 in the member 46 so located that when the cam roll 60 is at the outer limit of its movement as shown in dotted lines in Fig. 2, the hole will be in registration with the center of the pin 56 in which hole corresponding to the hole 66 is made so that by putting a pin through the hole 66 into the hole 68 the parts will be locked against movement and the cam 64 become inoperative.

The result effected by application of the present invention to the hand method machine is, therefore, that the operations of wiping the upper over the shoe bottom and of inserting a tack are performed under exactly the same speed conditions as in the past, and that throughout the lasting of the shoe around the sides, shank, heel and toe portions in each cycle the cam shaft will automatically slow down for a short time to give longer time than was hitherto available for the stretching of the upper without any attention on the part of the operator and without diminution of the output of lasted shoes.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine having instrumentalities for effecting successive operations upon the Work, the combination of operating means common to the instrumentalities for oper ating them in timed relation, a drivng member arranged for rotaton at a uniform angular velocity, and means between the driving member and said operating means acting to retard movement of said operating means relatively to the driving member while one of said instrumentalities is operating and for accelerating movement of said operating means above that of the driving member at another time in the cycle of the machine.

2. In a machine having instrumentalities for effecting successive operations upon the Work, the combination of a shaft for operatling the instrun'ientalities in succession, a

driving member arranged for rotation at uniform angular velocity, and means between the driving member and the shaft "for automatically varying the angular velocity of the shaft relatively to that of the driving member to prolong the time given to the operation of one of said instrumentalities and to make up the time lost in other portions of the cycle.

3. In a machine having instrumentalities for effecting successive operations upon the work, the combination of operating means common to said instrumentalities and capable of o aeratin the instrumentalities in a given normal timed relation if moved at a uni.- form speed, a driving member arranged to be rotated at a uniform angular velocity, and means between the driving member and said common operating means acting in each cycle to retard at one time and to accelerate at another time the movement of the common operating means relatively to the uniform movement of the driving member and consequently to vary the normal timed relation of the operation of said instrumem talities without'affecting the normal time occupied by the cycle,

4. In a machine having instrumentalities for effecting successive operations upon the work in each cycle, a cam shaft having a series of cams, connections from said cams to said instrumentalities for operating the insti'umentalities in a given timed relation when the shaft is turned at uniform angular velocity, a driving member arranged to be driven at uniform angular velocity, and means bet-ween the driving member and the shaft acting to modify the relative timing of said instrumentalities while maintaining the number of revolutions of the driving member and the cam shaft the same.

5. In a machine having instruinentalities for effecting successive operations upon the work in each cycle, a shaft, a driving member arranged to be rotated at a uniform angular velocity, a master cam, and con nections between the driving member and the shaft under control of the master cam for varying the angular velocity of the shaft relatively to the driving member to give greater operating time to one of said instrumentaliti-es and to make up time in other portions of the cycle.

6. In a machine for operating on shoes, the combination with means for performing different operations on a shoe successively in the course of the cycle of operations of the machine, of power drive-n operating mechanism, and means automatically operative in each cycle to drive said operating mechanism at a slower rate during one portion of the cycle and to drive said mechanism at afaster rate in another portion of the same cycle.

7. In a machine for operating onshoes, the combination with means for performing different operations on a shoe successively in the course of the cycle of operations of the machine, of power driven operating mechanism, and means automatically operative in each cycle to decelerate movement of the operating 'mechanism during one port-ion. of the cycle and to produce a corresponding acceleration in the remainder of the same cycle.

8. In a machine for operating on shoes, the combination with means for performing different operations on a shoe successively the machine, of power driven operating mechanism, and means automatically operative in each cycle to decelerate movement of the operating mechanism during one portion of the cycle and to effect acceleration in two stages of the remainder of the cycle.

10. In a. machine for operating on shoes, the combination with mechanism for performing difierent operations on a shoe successively in the course of the cycle of operations of the machine, of power driven operating means, and means automatically operative in each cycle to cause movement of the operating mechanism during one operation of the cycle, to take more than normal time to make up the time lost by increasing the speed of the operating mechanism above normal in portions of the remainder of the cycle located between the remaining operations, and toperform the remaining operations at normal speed.

ll. In a machine having instrumentalities for effecting successive operations upon a shoe, a driving member to be rotated at a uniform angular velocity, a shaft for operating the instruinentalities in normal timed relation, and means between the driving member and the shaft to give greater than normal operating time to one of said instrumentalities during a portion of the cycle and to make up the time in other portions of the cycle.

12. In a machine having a plurality of instrumentalities for effecting successive operations upon a shoe, a. driving member to be rotated at a uniform angular velocity, a shaft and connecting mechanism for operating the instrumentalities in normal timed relation, and means between the driving member and the shaft for decreasing the angular velocity of the shaft relatively to that of the driving member to prolong the time given to the operation of one of said instrumentalities and then to increase the angular velocity of the shaft to main tain the total time occupied by the operation of all of the instrumentalities unchanged.

18. In a machine having instrumentalities for effecting successive operations, a driving member to be rotated at a uniform angular velocity, a shaft and connecting mechanism for operating the instrumentalities in a given timed relation, a master cam, and connections between the driving member and shaft under control of the master cam for varying the angular velocity of the shaft to prolong the time during which one of said instrumentalities is operating and to make up the lost time in other portions of the cycle.

14. In a machine having instrumentalities for efi'ecting successively upper stretching, overwiping and tacking operations upon a shoe upper, the combination of operating means common to the instrumentalities for operating them in timed relation, a driving member arranged for rotation at a uniform angular velocity, and means between the driving member and said operating means acting to retard movement of said operating means relatively to the driving member while the stretching instrumentality is op erating and for accelerating movement of said operating means above that of the driving member at another time in the cycle of the machine.

15. In a machine having instrumentalities for effecting successively upper stretching, overwiping and tacking operations upon a shoe upper, the combination of a shaft for operating the instrumentalities in succession, a driving member arranged for rotation at uniform angular velocity, and cam controlled means between the driving member and the shaft for automatically reducing the angular velocity of the shaft below to that of the driving member to prolong the time given to the operation of the up per stretching instrumentality and increase the angular velocity of the shaft above that of the driving member at other time in the cycle than that occupied by the overwiping and tacking operations.

16. In a machine for operating on shoes, means for stretching an upper, means for overwiping and tacking the upper, a cam shaft having a series of cams, connections from said means to the cam shaft such that uniform angular rotation of the shaft would be imparted to all of said means and cause them to act in predetermined timed relation, during a cycle driving means rotated at uniform angular velocity to apply power to said shaft, and cam controlled connections between said driving means and the cam shaft for diminishing and increasing the angular velocity of the cam shaft relatively to the uniform velocity of the driving means in such manner as to set up a new time relation between the stretching operation and the wiping and tacking operations while maintaining the time occupied by the cycle unchanged.

17. In a machine for operating on shoes, means for stretching an upper, means for overwiping the upper, means for tacking the upper, a cam shaft having a series of cams, connections from said means to the cam shaft such that uniform angular rotation of the shaft would impart motion to all of said means and cause them to act in a predetermined timed relation, means rotated at uniform angular velocity to apply power to said shaft, a master cam, and con nee-tions from said power applying means to the cam shaft controlled by the master cam for diminishing and increasing the angular velocity of the cam shaft to establish a time relation difierent from said predetermined time relation in such manner that the stretching operation takes place slowly and the time lost in this operation is made up at other times in the cycle.

18. In a machine having a plurality of instrumentalities for performing in succession a plurality of operations upon a shoe in each cycle of a succession of uninterruptedly re peated cycles, the combination of a member arranged to be rotated at uniform angular velocity, means for operating said instrumentalities from said member, and means for automatically varying in each cycle the velocity given to said operating means while some instrumentalities are operated rela- 'tively to the velocity given to the operating means when other instrumentalities are being operated.

19. In a machine for lasting successive por ions of an upper progressively along the periphery of a shoe, means for updrawing the upper, means for overwiping and tacking the upper, a cam shaft for operatingsaid means, means driven at constantspeed for applying power to said shaft, and means between the power applyingmeans and the shaft for effecting a deceleration of the movement of the shaft below said constant speed during the updraw movement and an acceleration of the shaft above said constant speed priorto the action of the overwiping means.

20. In a machine for lasting successive portions of anupper progressively along the periphery of a shoe, means for updrawing the upper, means for overwiping and tacking the'upper, a shaft for operating said means, means driven at constant speed for applying power to said shaft, and means between the power applying means and the shaft for effecting during a portion of each cycle a deceleration of the movement of the shaft belo said constant speed during the 'updraw movement, for effecting acceleration of the movement of the shaft above said constant speed during another portion of the cycle to maintain the time for the complete cycle unchanged and for effecting the overwiping and tacking operation at said constant speed. I

21. In a machine for lasting successive portions of an upper progressively along the periphery of a shoe, means for updrawing the upper, means for overwiping and tack ing the upper, a cam shaft for operating said means, rotary means driven'at uniformangular velocity for applying power to said shaft, a stationary cam, and rotating means between the power applying means and the shaft under control of the cam for effecting a deceleration of the updraw movement.

22. In a machine for lasting successive portions of an upper over a last progressively along the periphery of a shoe, means for updrawing the upper, means for overwiping and tackingthe upper, a cam shaft for operating said means, means for applying power to said shaft, and means between the power applying means and the shaft for effectin a deceleration of the shaft during the up raw movement and an accelerationof the shaft between the updraw and the wiping operations and between the tacking operation and the end of the cycle.

23. In a machine for lasting successive portions of an upper over a last progressively along the periphery of a shoe, means for updrawing the upper, means for over wiping and tacking the upper, a cam shaft for operating said means in normal timed relation, means for applying" power to said shaft, and means between the power applying means and the shaft for increasing above normal the time devoted to the updrawing operation, maintaining the time occupied by wiping and tacking operations unchanged, and reducing below normal the time occupied by other portions of the cycle.

24. In a machine for'lasting successive portions of an upper over a last progressively along the periphery of a shoe, means for updrawing the upper, means for overwiping and tacking the upper, a cam shaft for operating said means, rotating means having a uniform angular velocity for ap plying power to said shaft, and means between the said rotating means and the shaft for effecting a deceleration of the shaft relatively to the rotating means to slow down the movement of the updrawing means and acceleration of the shaft above the angular velocity of the rotating means after the updrawing operation and prior to the wiping operation.

25. In a machine for lasting successive portions of an upper over a last progressively along the peripheryof a shoe, means for updrawing the upp r, means for over-' wiping and tacking the upper, a cam shaft for operating said means, rotating means for applying power to said shaft to rotate it, and means between the power applying means and the shaft for reducing the angular velocity of the shaft below that of the power applying means to increase the time devoted to the updrawing movement and increasing the angular velocity of the shaft above that of the power applying means during a portion of the remainder of the cycle.

26. In a machine for'lasting successive portions of an upper over a last progressively along the periphery of a shoe, means for updrawing the upper, means for over wiping and tacking the upper, a cam shaft for operating said means, rotary means for driving said shaft, andcam controlled means between the rotary driving means'and the shaft acting to diminish the angular velocity of the shaft below that of the rotary drivnave ing means to cause movement 01 the updrawing means to take place slowly and to increase the angular velocity of the shaft above that of the rotary driving means alter the completion of the updrawing op eration and after the wiping and tacking operations.

27. in a machine for lasting successive portions of an upper over a last progressively along the periphery of a shoe, means for updrawing the upper, means for over wiping and tacking the upper, a cam shaft for operating said means, rotating means for applying power to said shaft, and means between the power applying means and the shaft for reducing the angular velocity of the shaft relatively to that of the power applying means to increase the time devoted to the updrawing operation, maintaining the angular velocity of the shaft the same as that of the power applying means during the wiping and tacking operations, and increasing the angular velocity oi the shaft relatively to that of the power applying means at other times in the cycle to malre up the time lost during the updrawing operation.

28. In a machine of the class described, the combination or a rotary driving member, a rotary driven member, means for connecting the said members to cause one to be driven from the other, aroll on said con necting means, and a stationary cam contoured to impart movement to the roll radially of said rotary members and cause the angular velocity of one rotary member to be varied relatively to that of the other rotary member.

29. In a machine of the class described, the combination of two rotary members, connections to cause one of said members to be rotated by the other member in the same direction, a roll on the connecting means, and a cam engaged by said roll constructed and arranged to cause movement or the roll substantially radially of said members and to ei'lect movement of said connecting means to cause relative angular movements of said members during their rotation.

30. In a machine of: the class described, the combination or a rotary driving member, a rotary driven member arranged coaxial relation, a stationary cam, and a three-arm lever having one arm pivotally connected to the driving member at a c istance from its axis, one arm pivoted to the driven member at a less distance from its aXis and the third arm carrying a roll engaging said cam, said elements being constructed and arranged to cause a constant angular velocity of the driving member to impart varying angular velocity to the driven member.

31. In a machine of the class described, the combination or a rotary driving member, a rotary driven member arranged in coaxial relation, a stationary cam, a triangular lever having at one corner a pin-andslot pivotal connection to the driving member at a distance from its axis, having pivotal connection at another corner to the driven member at a less distance from its axis, and having at the third corner a roll engaging the earn, the cam being contoured to cause uniform angular movement of the rotary driving member to impart to the driven member decreased and increased angular velocities relatively to that of the driving member.

32. A machine of the class described having, in combination, a driving member, a driven shaft having an arm, a triangular lever having one corner pivotally connected to the driving member, one corner pivoted to the arm of the driven shaft and the third corner carrying a roll, and a cam engaged by said roll and contoured to cause a constant angular velocity of the driving member to impart varying angular velocities to the driven shaft.

33. In a machine of the class described, the combination of a rotary driving member and a rotary driven member arranged in coaxial relation, a stationary cam, and a three-arm lever having one arm pivoted to the driving member, one arm pivoted to the driven member and the third arm carrying a roll engaging said cam, all of said elements being constructed and arranged to cause a constant angular velocity of the driving member to impart varying angular velocity to the driven member.

34. In a machine of the class described, the combination of a shaft having an arm fixed thereto, a driving member including an arm rotatable coaxially or the shaft, means for connecting one arm to the other arm to cause uniform angular movement of the driving arm to impart the same angular movement to the arm on the shaft when the position of said connecting means relatively to the arms is maintained unchanged, a cam roll on said connecting means, and a fixed cam engaged by said roll and contoured to vary the position of said connecting means relatively to the arms and hence to cause the angular velocities of the arms to be relatively varied.

In testimony whereof I have signed my name to this specification.

ARTHUR, BATES. 

